Quagga Routing Suite

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About Quagga

Quagga is a routing software suite,
providing implementations of OSPFv2, OSPFv3, RIP v1 and v2, RIPng and BGP-4
for Unix platforms, particularly FreeBSD, Linux, Solaris and NetBSD. Quagga
is a fork of GNU Zebra which was
developed by Kunihiro Ishiguro. The Quagga tree aims to build a more
involved community around Quagga than
the current centralised model of GNU
Zebra.

The Quagga architecture consists of a core daemon, zebra,
which acts as an abstraction layer to the underlying Unix kernel and
presents the Zserv API over a Unix or TCP stream to Quagga clients. It is
these Zserv clients which typically implement a routing protocol and
communicate routing updates to the zebra daemon. Existing Zserv implementations are:

Support for OSPFv3 and IS-IS is various beta states currently; IS-IS for IPv4 is believed to be usable while OSPFv3 and IS-IS for IPv6 have known issues.

Additionally, the Quagga architecture has a rich development library to
facilitate the implementation of protocol/client daemons, coherent in
configuration and administrative behaviour.

Quagga daemons are each configurable via a network accessible CLI
(called a 'vty'). The CLI follows a style similar to that of other routing
software. There is an additional tool included with Quagga called 'vtysh',
which acts as a single cohesive front-end to all the daemons, allowing one
to administer nearly all aspects of the various Quagga daemons in one place.